* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
}

img {
    width: 100%;
    /* vertical-align: middle; */
}
    
.box {
    display: flex;
    justify-content: center;
    width: 1500px;
    height: 247px;
    margin: 20px ;
}

.box li {
    position: relative;
    float: left;
    width: 350px;
    height: 247px;
    margin-right: 30px;
}
.box li::after {
    content: '';
    width: 350px;
    height: 247px;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: all, 1s;
    background-image: linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.5));
}


.center{
    position: absolute;
    padding: 20px;
    color: #fff;
    bottom: 0;
    left: 0;
}
.box li:hover .center{  
    transform: translate(0,-50px);
    transition: all 1s;
}
.box li:hover .more{
    animation: more1  0.5s 0.3s forwards;
}
.box li:hover::after{
    opacity: 1;
}

.more{
    position: absolute;
    padding: 20px;
    color: aliceblue;
    bottom: 0;
    left: 0;
    opacity: 0;
}
.more span{
    color: red;
}
@keyframes more1 {
    0%{
        opacity: 0;
    }
    100%{
        opacity: 1;
    }
}





